Въпросният случай се оправи, но още гърми последния тест с грешен отговор. Би трябвало всичко да върви.

А пък, когато сложа else if (a > b) на sortMileage последния тест гърми с runtime error.

Благодаря за влючването btw~~ <3

@MariqnK1

Това е цялото решение (100/100) в Judge:

function needForSpeed(input = []) {
  let numCars = Number(input.shift());
  let cars = input.splice(0, numCars);
  let objCars = {};

  for (const car of cars) {
    let [carModel, mileage, fuel] = car.split('|');
    mileage = Number(mileage);
    fuel = Number(fuel);

    if (!objCars.hasOwnProperty(carModel)) {
      objCars[carModel] = {mileage: mileage, fuel: fuel};
    }
  }

  let betterInput = input.splice(0, input.indexOf('Stop'));

  for (const line of betterInput) {
    let [command, carName, value, value2] = line.split(' : ');
    value = Number(value);
    value2 = Number(value2);

    switch (command) {
      case 'Drive':
        let distance = value;
        let fuel = value2;

        if (fuel > objCars[carName].fuel) {
          console.log('Not enough fuel to make that ride');
        } else if (objCars[carName].fuel > fuel) {
          objCars[carName].fuel -= fuel;
          objCars[carName].mileage += distance;
          console.log(`${carName} driven for ${distance} kilometers. ${fuel} liters of fuel consumed.`);

          if (objCars[carName].mileage >= 100000) {
            console.log(`Time to sell the ${carName}!`);
            delete objCars[carName];
          }
        }
        break;

      case 'Refuel':
        let fuelForRefill = value;

        if (objCars[carName].fuel + fuelForRefill >= 75) {
          console.log(`${carName} refueled with ${75 - objCars[carName].fuel} liters`);
          objCars[carName].fuel = 75;
        } else {
          objCars[carName].fuel += fuelForRefill;
          console.log(`${carName} refueled with ${fuelForRefill} liters`);
        }
        break;

      case 'Revert':
        let KMs = value;

        if (objCars[carName].mileage - KMs <= 10000) {
          objCars[carName].mileage = 10000;
        } else {
          objCars[carName].mileage -= KMs;
          console.log(`${carName} mileage decreased by ${KMs} kilometers`);
        }
        break;
    }
  }

  function sortByMileage(a, b) {
    a = a[1].mileage;
    b = b[1].mileage;

    let comp = 0;

    if (b > a) {
      comp = 1;
    } else if (b < a) {
      comp = -1;
    }

    return comp;
  }

  function sortAlphabetically(a, b) {
    a = a[0];
    b = b[0];

    return a.localeCompare(b);
  }

  let arr = Object.entries(objCars).sort((a, b) => sortByMileage(a, b) || sortAlphabetically(a, b));

  for (let i = 0; i < arr.length; i++) {
    console.log(`${arr[i][0]} -> Mileage: ${arr[i][1].mileage} kms, Fuel in the tank: ${arr[i][1].fuel} lt.`);
  }
}

Моя грешка, благодаря!